Add digest.h and protocol digest classes

Builds/VisualStudio2013/RippleD.vcxproj

@@ -2639,6 +2639,8 @@
     </ClInclude>
     <ClInclude Include="..\..\src\ripple\protocol\BuildInfo.h">
     </ClInclude>
+    <ClInclude Include="..\..\src\ripple\protocol\digest.h">
+    </ClInclude>
     <ClInclude Include="..\..\src\ripple\protocol\ErrorCodes.h">
     </ClInclude>
     <ClInclude Include="..\..\src\ripple\protocol\HashPrefix.h">
@@ -2659,6 +2661,10 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\src\ripple\protocol\impl\digest.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\src\ripple\protocol\impl\ErrorCodes.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='debug|x64'">True</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='release|x64'">True</ExcludedFromBuild>

Builds/VisualStudio2013/RippleD.vcxproj.filters

@@ -3339,6 +3339,9 @@
     <ClInclude Include="..\..\src\ripple\protocol\BuildInfo.h">
       <Filter>ripple\protocol</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\ripple\protocol\digest.h">
+      <Filter>ripple\protocol</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\ripple\protocol\ErrorCodes.h">
       <Filter>ripple\protocol</Filter>
     </ClInclude>
@@ -3357,6 +3360,9 @@
     <ClCompile Include="..\..\src\ripple\protocol\impl\ByteOrder.cpp">
       <Filter>ripple\protocol\impl</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\ripple\protocol\impl\digest.cpp">
+      <Filter>ripple\protocol\impl</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\ripple\protocol\impl\ErrorCodes.cpp">
       <Filter>ripple\protocol\impl</Filter>
     </ClCompile>

src/BeastConfig.h

@@ -187,4 +187,9 @@
 #define RIPPLE_ENABLE_MULTI_SIGN 0
 #endif
 
+// Uses OpenSSL instead of alternatives
+#ifndef RIPPLE_USE_OPENSSL
+#define RIPPLE_USE_OPENSSL 0
+#endif
+
 #endif

src/ripple/protocol/digest.h

@@ -0,0 +1,158 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_PROTOCOL_DIGEST_H_INCLUDED
+#define RIPPLE_PROTOCOL_DIGEST_H_INCLUDED
+
+#include <beast/crypto/ripemd.h>
+#include <beast/crypto/sha2.h>
+#include <beast/hash/endian.h>
+#include <beast/utility/noexcept.h>
+#include <array>
+
+namespace ripple {
+
+/*  Message digest functions used in the Ripple Protocol
+
+    Modeled to meet the requirements of `Hasher` in the
+    `hash_append` interface, currently in proposal:
+
+    N3980 "Types Don't Know #"
+    http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3980.html
+*/
+
+//------------------------------------------------------------------------------
+
+/** RIPEMD-160 digest
+
+    @note This uses the OpenSSL implementation
+*/
+struct openssl_ripemd160_hasher
+{
+public:
+    static beast::endian const endian =
+        beast::endian::native;
+
+    using result_type =
+        std::array<std::uint8_t, 20>;
+
+    openssl_ripemd160_hasher();
+
+    void
+    operator()(void const* data,
+        std::size_t size) noexcept;
+
+    explicit
+    operator result_type() noexcept;
+
+private:
+    char ctx_[96];
+};
+
+/** SHA-256 digest
+
+    @note This uses the OpenSSL implementation
+*/
+struct openssl_sha256_hasher
+{
+public:
+    static beast::endian const endian =
+        beast::endian::native;
+
+    using result_type =
+        std::array<std::uint8_t, 32>;
+
+    openssl_sha256_hasher();
+
+    void
+    operator()(void const* data,
+        std::size_t size) noexcept;
+
+    explicit
+    operator result_type() noexcept;
+
+private:
+    char ctx_[112];
+};
+
+//------------------------------------------------------------------------------
+
+// Aliases to choose the correct digest implementation
+
+#if RIPPLE_USE_OPENSSL
+using ripemd160_hasher = openssl_ripemd160_hasher;
+using sha256_hasher = openssl_sha256_hasher;
+#else
+using ripemd160_hasher = beast::ripemd160_hasher;
+using sha256_hasher = beast::sha256_hasher;
+#endif
+
+//------------------------------------------------------------------------------
+
+/** Returns the RIPEMD-160 digest of the SHA256 hash of the message.
+
+    This operation is used to compute the 160-bit identifier
+    representing a Ripple account, from a message. Typically the
+    message is the public key of the account - which is not
+    stored in the account root.
+    
+    The same computation is used regardless of the cryptographic
+    scheme implied by the public key. For example, the public key
+    may be an ed25519 public key or a secp256k1 public key. Support
+    for new cryptographic systems may be added, using the same
+    formula for calculating the account identifier.
+
+    Meets the requirements of Hasher (in hash_append)
+
+    @param digest A buffer of at least 20 bytes
+*/
+struct ripesha_hasher
+{
+private:
+    sha256_hasher h_;
+
+public:
+    static beast::endian const endian =
+        beast::endian::native;
+
+    using result_type =
+        std::array<std::uint8_t, 20>;
+
+    void
+    operator()(void const* data,
+        std::size_t size) noexcept
+    {
+        h_(data, size);
+    }
+
+    explicit
+    operator result_type() noexcept
+    {
+        auto const d0 = static_cast<
+            decltype(h_)::result_type>(h_);
+        ripemd160_hasher rh;
+        rh(d0.data(), d0.size());
+        return  static_cast<
+            decltype(rh)::result_type>(rh);
+    }
+};
+
+} // ripple
+
+#endif

src/ripple/protocol/impl/digest.cpp

@@ -0,0 +1,86 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <BeastConfig.h>
+#include <ripple/protocol/digest.h>
+#include <beast/cxx14/type_traits.h> // <type_traits.h>
+#include <openssl/ripemd.h>
+#include <openssl/sha.h>
+
+namespace ripple {
+
+static_assert(sizeof(decltype(
+    openssl_ripemd160_hasher::ctx_)) ==
+        sizeof(RIPEMD160_CTX), "");
+
+openssl_ripemd160_hasher::openssl_ripemd160_hasher()
+{
+    auto const ctx = reinterpret_cast<
+        RIPEMD160_CTX*>(ctx_);
+    RIPEMD160_Init(ctx);
+}
+
+void
+openssl_ripemd160_hasher::operator()(void const* data,
+    std::size_t size) noexcept
+{
+    auto const ctx = reinterpret_cast<
+        RIPEMD160_CTX*>(ctx_);
+    RIPEMD160_Update(ctx, data, size);
+}
+
+openssl_ripemd160_hasher::operator result_type() noexcept
+{
+    auto const ctx = reinterpret_cast<
+        RIPEMD160_CTX*>(ctx_);
+    result_type digest;
+    RIPEMD160_Final(digest.data(), ctx);
+    return digest;
+}
+
+static_assert(sizeof(decltype(
+    openssl_sha256_hasher::ctx_)) ==
+        sizeof(SHA256_CTX), "");
+
+openssl_sha256_hasher::openssl_sha256_hasher()
+{
+    auto const ctx = reinterpret_cast<
+        SHA256_CTX*>(ctx_);
+    SHA256_Init(ctx);
+}
+
+void
+openssl_sha256_hasher::operator()(void const* data,
+    std::size_t size) noexcept
+{
+    auto const ctx = reinterpret_cast<
+        SHA256_CTX*>(ctx_);
+    SHA256_Update(ctx, data, size);
+}
+
+openssl_sha256_hasher::operator result_type() noexcept
+{
+    auto const ctx = reinterpret_cast<
+        SHA256_CTX*>(ctx_);
+    result_type digest;
+    SHA256_Final(digest.data(), ctx);
+    return digest;
+}
+
+} // ripple

src/ripple/unity/protocol.cpp

@@ -23,6 +23,7 @@
 #include <ripple/protocol/impl/AnySecretKey.cpp>
 #include <ripple/protocol/impl/BuildInfo.cpp>
 #include <ripple/protocol/impl/ByteOrder.cpp>
+#include <ripple/protocol/impl/digest.cpp>
 #include <ripple/protocol/impl/ErrorCodes.cpp>
 #include <ripple/protocol/impl/HashPrefix.cpp>
 #include <ripple/protocol/impl/Indexes.cpp>